The Impact Fabric Grid for Small Square Luxbanx is a 16 x 16" light modifier that attaches quickly to the softbox's recessed front via touch-fasteners. The 40 degree grid narrows the beam spread from your softbox to control spill light and add directionality similar to a reflector, while maintaining a soft quality of light. Unlike unwieldy rigid grids, Impact fabric grids are extremely light weight and fold flat for transport in the included carry case.